Reinforced housing



June 19, 1945. E. o. NUNN REINFORCED HOUSING Filed Aug. 20, 1942 2 Sheets-Sheet l v v INVENTOR.

ATTORNEY June 19, 1945. N N 2,378,860

REINFORCED HOUS ING Filed Aug. 20, 1942, 2 Sheets-Sheet 2 BY a ATTORNEY Patented June 19, 1945 I ameness HOUSING e I Ewing D. Nunn, Milwaukee, Wis., assignor to Northern-Signal C0,, Inc.,

corporation of Wisconsin p AppIication'Au'guStZO,19 %2,Serialhlo.455,551l w 2Claims. (o1.220-2'2)- The invention relates to housings for electrical i apparatus and more particularly to a housing or casing for an electric fence charger.

Heretofore, casings for this kind of equipment have been constructed substantially entirely of metal, and the object of this invention is to provide a casing structure formed partly of metal and the bulk of non-metallic material reinforced by the lesser amount of metallic material. According to the invention, the main body of the casing is formed from pressed or molded paper pulp open at one end. Ametal closure plate is secured in weatheringcontact with this end and acts to prevent spreading of the casing laterally in one direction while a shelf' for the equipment within the casing is secured to the opposite sides of the casing and acts to brace the casing in the opposite direction.

The invention further consists of the several features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings:

Fig. 1 is a side elevation view of ture embodying the invention;

Fig. 2 is a top plan view;

Fig. 3 is an end view of the fence charger with the closure plate removed;

Fig. 4 is a vertical transverse sectional view taken generally on the lined-4 of Fig. 3. I

Referring to the drawings, the main body 6 of the casing is formed of non-metallic material, preferably paper pulp pressed and molded into a generally hollow rectangular'shape with one side open. This casing is an efficient insulator of any stray currents that may develop in the apparatus. The casing is divided into two compartments 1 and 8 by means of asheet metal plate 9 forming a shelf and mounted in a casing strucposition upon four metal brackets H] which are secured by bolts II to the casing. The brackets III are riveted to the sheet metal plate 9 and with said plate form an internal brace to prevent lengthwise spreading of the casing. Adjacent the open end brackets I2 and I3 are secured to the casing by suitable rivets [4. Each of these brackets has threaded apertures IE to receive the threaded shank of a fastening screw I5 which is adapted to pass through a metal backing plate I6 to secure it to the casing. This backing plate [6 is of pressed sheet metal and has a hanger clip I1 secured thereto. To make a substantially air-,

Milwaukee, Wis., Ca.

L! of this strip, and this forms avery effective seal while the paper casing itself is coated exteriorly and interiorly with the suitable coating to prevent passage of moisture through the same,

so that a weatherproof housing is provided.

Where such a housing is formed for a fence charger, the charging apparatus 20 is mounted on the shelf 9 and suitably connected to a current supply such as a battery 2| below the shelf 9. The on and off switch 22 is mounted in a plastic case 23, parts of which project through an opening in the case and are riveted to the casing around this opening to form a weather-tight connection. The terminal connections leading to the fence wires to be charged are housed in a casing 24 which projects through an opening 25 in the other side of the casing and is formed of suitable plastic, riveted to the casing adjacent the sides of the opening to form a weather-tight connection. The device may be attached tothe wall of a room or building by connection of the tapered clip I! with a suitable correspondingly tapered clip bracket. The metal backing plate I6 has a hook 2'6 engageable with the medial portion of the bottom of the casing when said back plate is mounted in position, and this backplate through its connection, previously described, by the screws l5 with the casing acts to brace the top and bottom portion of the casing relative to the other parts thereof to prevent it spreading.

Also by providing threaded projections 21 integral with or secured to the shelf, screws 28 similar to the screws I 5 maybe used to clamp the shelf 9 directly to the back plate, so that the cas ing itself may be relieved of considerable of the load by its-transfer from the shelf to the metal back plate.

The problem of producing a satisfactory bracket hung fence charger housing from pressed or molded paper pulp is one of rendering such a housin capable of sustaining the substantial weight of dry cell batteries and other electrical instrumentalities contained therein without undesirable and gradual sagging or creeping taking place. Such creeping under load has heretofore been considered inherent in the material, but I have discovered that this occurs only when loadings are permitted to exceed values characteristic of the material. The many advantages of such fibrous material from the standpoint of thermal insulation with consequent diminution of condensation difficulties and the advantages of ease of manufacture, light weight and low cost, have not h retofore been available because it has been thought that this creeping tendency could not be eliminated. Through this invention, however, less metal than could alone furnish the necessary strength is disposed so as to strengthen and brace the housing in such a Way that loadings are held within desired limits and creeping to an undesirable degree thu prevented.

The casing has a suitable handl 29 secured to the top portion thereof in a position to balance the weight of the parts enclosed within the casing to permit easy carrying of the apparatus.

I desire it to be understood that this invention is not to be limited to any particular form orarrangement of parts except in so far as such limitations are included in the claims.

What I claim as my invention is a 1. In a device of the character described, a housing comprising an open ended casing of pressed paper pulp, a sheet metal plate disposed in said casing lengthwise thereof, metal bracket arms connecting said plate to opposi e-sides of said casing, metal fasteners secured to the casing adjacent its open end, a sheet metal backing plate having a hook engaging one side of said casing at its open end and clamped to said fasteners,

I certain of said fasteners being on the opposite it into two compartments and fixedly connected at its ends to opposite sides of the casing, a sheet vmetal closure plate secured to the otheropposite sides thereof and to the shelf at its opposite ends,

1 said plate andshelf with their connections formingan .all-m talbrace for the sides, top, and bottom of said casing.

EWING D. NUNN. 

